The effect of ginger supplementation on serum C-reactive protein, lipid profile and glycaemia: a systematic review and meta-analysis

  • Mohsen Mazidi
  • Hong-Kai Gao
  • Peyman Rezaie
  • Gordon A. Ferns
Keywords: Meta-analysis, ginger supplementation, C-reactive protein, fasting blood glucose

Abstract

Aim: To undertake a systematic review and meta-analysis of prospective studies to determine the effect of ginger supplementation on serum C-reactive protein (CRP), lipid profile, and glycaemia.

Method: PubMed-MEDLINE, Web of Science, Cochrane Database, and Google Scholar databases were searched (up until July 2016) to identify prospective studies evaluating the impact of ginger supplementation on serum CRP. Random-effects model meta-analysis was used for quantitative data synthesis. Sensitivity analysis was conducted using the leave-one-out method. Heterogeneity was quantitatively assessed using the I2 index. Systematic review registration: CRD42016035973.

Results: From a total of 265 entries identified via searches, 9 studies were included in the final selection. The meta-analysis indicated a significant reduction in serum CRP concentrations following ginger supplementation [weighted mean difference (WMD)−0.84 mg/L (95% CI −1.38 to −0.31, I2 56.3%)]. The WMD for fasting blood glucose and HbA1c was −1.35 mg/dl (95% CI −2.04 to −0.58, I2 12.1%) and −1.01 (95% CI −1.28 to −0.72, I2 9.4%), respectively. Moreover, high-density lipoprotein and triglyceride significantly improved after ginger administration [1.16 mg/dl (95% CI 0.52 to 1.08, I2 12.3%) and −1.63 mg/dl (95% CI −3.10 to −0.17, I2 8.1%), respectively]. These findings were robust in sensitivity analyses. Random-effects meta-regression revealed that changes in serum CRP levels were independent of the dosage of ginger supplementation (slope −0.20; 95% CI −0.95 to 0.55; p=0.60).

Conclusions: This meta-analysis suggests that ginger supplementation significantly reduces serum CRP and improves glycaemia indexes and lipid profile. Randomized control trials with larger sample size and with a longer-term follow-up period should be considered for future investigations.

Keywords: meta-analysis; ginger; supplementation; C-reactive protein; fasting blood glucose; lipids

(Published: 1 November 2016)

Citation: Food & Nutrition Research 2016, 60: 32613 - http://dx.doi.org/10.3402/fnr.v60.32613

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Published
2016-11-01
How to Cite
1.
Mazidi M, Gao H-K, Rezaie P, Ferns G. The effect of ginger supplementation on serum C-reactive protein, lipid profile and glycaemia: a systematic review and meta-analysis. fnr [Internet]. 2016Nov.1 [cited 2019Jul.20];600. Available from: https://foodandnutritionresearch.net/index.php/fnr/article/view/1063
Section
Meta-analyses